《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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主办单位: 苏州混凝土水泥制品研究院
中国混凝土与水泥制品协会

主编 : 李建华
常务副主编 : 王春蓉
刊期 : 月刊
电话 : 0512-68285716
E-mail : sccpitg@126.com
国内统一刊号(CN) : 32-1173/TU
国际标准刊号(ISSN) : 1000-4637
邮发代号 : 28-80

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混凝土研究

超高性能混凝土在模拟污水环境中的劣化过程研究

胡文佩1，2，李华兵3，郭晓潞3，*

2024年第4期

摘要

引用本文

摘要：制备浓度均为5%的硫酸溶液和柠檬酸溶液模拟污水环境，对比研究了普通混凝土（NC）和超高性能混凝土（UHPC）在模拟污水环境中的耐腐蚀性能和劣化过程。结果表明：经两种腐蚀溶液浸泡后，UHPC的外观破坏、腐蚀深度及劣化深度均远低于NC；浸泡106 d后，浸泡UHPC腐蚀溶液的pH值趋于稳定，而浸泡NC的腐蚀溶液pH值则持续上升；与NC相比，经硫酸溶液浸泡后，UHPC腐蚀表面的微观结构更密实，腐蚀表面仍有富余的Ca2+来有效防止硫渗入，从而使UHPC更耐酸腐蚀。 Abstract: Sulfuric acid solution and citric acid solution, both with the concentration of 5%, were prepared to simulate the sewage environment, and the corrosion resistance and deterioration process of normal concrete(NC) and ultra-high performance concrete (UHPC) in the simulated sewage environment were compared and studied. The results show that after soaking in the two corrosive solutions, the appearance damage, corrosion depth and deterioration depth of UHPC are much lower than those of NC. After soaking for 106 d, the pH value of the corrosion solution soaked in UHPC immersed tends to stabilize, while the pH value of the corrosion solution soaked in NC continues to increase. Compared with NC, the microstructure of the corrosion surface of UHPC is denser after soaking in sulfuric acid solution, and the corrosion surface is still rich in calcium to effectively prevent sulfur infiltration, which makes UHPC more resistant to acid corrosion.

胡文佩,李华兵,郭晓潞.超高性能混凝土在模拟污水环境中的劣化过程研究[J].混凝土与水泥制品,2024(4):1-6. HU W P,LI H B,GUO X L.Degradation progress of ultra-high performance concrete exposed to simulated sewage environment[J].China Concrete and Cement Products,2024(4):1-6.

氧化石墨烯-硅烷复合乳液对混凝土抗氯离子渗透性能的影响及机理分析

王继祖1，路荣波1，王汉增2

2024年第4期

摘要

引用本文

摘要：研究了涂覆氧化石墨烯-硅烷复合乳液和硅烷乳液对混凝土抗氯离子渗透性能的影响，并通过分子动力学模拟构建了氯离子在C-S-H凝胶孔道中的传输模型，分析了复合乳液的作用机理。结果表明：涂覆复合乳液与硅烷乳液均能有效提高混凝土的抗氯离子渗透性能，其中，复合乳液的效果更好；乳液中的分子与C-S-H界面通过静电力、分子间相互作用力、成键等方式互相结合，改变了C-S-H界面性能，减缓了水分子进入孔道中的速度，也降低了氯离子的渗透速度；乳液分子在孔道中通过吸附作用吸附周围的分子，形成较大体积的团簇体，阻塞了孔道，抑制了孔道中氯离子与水分子的传输，从而提高了混凝土的抗氯离子渗透性能。 Abstract: The coating effect of graphene oxide-silane composite lotion and silane lotion on the chloride ion penetration resistance of concrete was studied. The transport model of chloride ions in C-S-H gel channels was constructed by molecular dynamics simulation. The results show that coating composite lotion and silane lotion can effectively improve the chloride ion penetration resistance of concrete, and composite lotion has better effect. The molecules in the lotion and the C-S-H interface combine with each other through electrostatic force, intermolecular interaction force, bonding, etc., which changes the performance of the C-S-H interface, slows down the speed of water molecules entering the pores, and also reduces the penetration speed of chloride ions. The lotion molecules adsorb the surrounding molecules through adsorption in the pores, forming large clusters, blocking the pores, inhibiting the transmission of chloride ions and water molecules in the pores, thus improving the chloride ion penetration resistance of concrete.

王继祖,路荣波,王汉增.氧化石墨烯-硅烷复合乳液对混凝土抗氯离子渗透性能的影响及机理分析[J].混凝土与水泥制品,2024(4):7-11. WANG J Z,LU R B,WANG H Z.Effect of graphene oxide silane composite lotion on chloride ion penetration resistance of concrete and its mechanism analysis[J].China Concrete and Cement Products,2024(4):7-11.

高效缓凝减水剂与氧化镁膨胀剂对混凝土性能的影响

胡宇婷1，李伟1，吉飞1，张风臣2，郑春扬1

2024年第4期

摘要

引用本文

摘要：研究了不同高效缓凝减水剂（柠檬酸、葡萄糖酸钠、柠檬酸镁、柠檬酸锂）分别与氧化镁膨胀剂的共同作用对混凝土工作性、力学性能、干燥收缩、抗裂性能的影响。结果表明：柠檬酸锂对掺氧化镁膨胀剂混凝土拌合物的坍落度有负面影响，但柠檬酸、葡萄糖酸钠、柠檬酸镁能在一定程度上改善混凝土的工作性；各高效缓凝减水剂均可提高混凝土的力学性能；葡萄糖酸钠、柠檬酸镁、柠檬酸锂均可减少混凝土的干燥收缩；柠檬酸、葡萄糖酸钠、柠檬酸镁均对氧化镁膨胀剂在混凝土中的补偿收缩作用有正向影响，其中，柠檬酸镁、葡萄糖酸钠的效果相对更好；柠檬酸对掺氧化镁膨胀剂的混凝土早期开裂性能有负面影响，会促进裂缝的产生。 Abstract: The effects of different high-efficiency retarding(citric acid, sodium gluconate, magnesium citrate and lithium citrate) and water reducing agent combined with magnesium oxide expansion agent on the workability, mechanical properties, drying shrinkage, and crack resistance of concrete were studied. The results show that lithium citrate has a negative impact on the slump of concrete with magnesium oxide expansion agents, but the citric acid, sodium gluconate, and magnesium citrate can improve the workability of concrete to a certain extent. All high-efficiency retarding and water reducing agents can improve the mechanical properties of concrete. Sodium gluconate, magnesium citrate, and lithium citrate can all reduce the drying shrinkage of concrete. Citric acid, sodium gluconate, and magnesium citrate all have a positive effect on the compensatory shrinkage of magnesium oxide expansion agents in concrete, among which magnesium citrate and sodium gluconate have relatively better effects. Citric acid has a negative impact on the early cracking performance of concrete mixed with magnesium oxide expansion agent, which can promote the generation of cracks.

胡宇婷,李伟,吉飞,等.高效缓凝减水剂与氧化镁膨胀剂对混凝土性能的影响[J].混凝土与水泥制品,2024(4):12-15,20. HU Y T,LI W,JI F,et al.Influence of high-efficiency retarding and water reducing agents and magnesium oxide expansion agents on the performance of concrete[J].China Concrete and Cement Products,2024(4):12-15,20.

微纳米气泡水对砂浆力学、收缩性能的影响

罗作球1，2，胡宇博1，2，*，何廷树3，张凯峰1，2，孟刚1，2，万赈民3，张林啸1，2

2024年第4期

摘要

引用本文

摘要：为了探究微纳米气泡水（NBW）作为拌和水对砂浆性能的影响，对NBW与普通水拌和的砂浆抗压强度与收缩性能进行了对比分析。结果表明：NBW使砂浆28 d抗压强度提高了6%~13%，早期抗压强度提高更明显；NBW与矿物掺合料具有协同作用，能够降低砂浆的收缩，减少质量损失；NBW可以降低砂浆的总孔隙率和平均孔径，使砂浆的微观结构更加密实。 Abstract: In order to investigate the effect of micro-nano bubble water(NBW) as mixing water on the performance of mortar, a comparative analysis was conducted on the compressive strength and shrinkage deformation of mortar mixed with NBW and ordinary water. The results show that NBW increases the 28 d compressive strength of mortar by 6%~13%, with a more significant increase in early compressive strength. NBW has a synergistic effect with mineral admixtures, which can reduce the shrinkage of mortar and reduce mass loss. NBW can reduce the total porosity and average pore size of mortar, making the microstructure of mortar more compact.

罗作球,胡宇博,何廷树,等.微纳米气泡水对砂浆力学、收缩性能的影响[J].混凝土与水泥制品,2024(4):16-20. LUO Z Q,HU Y B,HE T S,et al.Influence of micro-nano bubble water on the mechanical and shrinkage properties of mortar[J].China Concrete and Cement Products,2024(4):16-20.

超高性能混凝土的流变性能及其应用研究进展

张国芳1，2，3，胡文佩1，2，3，*

2024年第4期

摘要

引用本文

摘要：综述了各种组成材料（水泥、矿物掺合料及纳米材料、骨料、纤维、外加剂）对超高性能混凝土（UHPC）流变性能的影响，并分析了UHPC在桥面铺装、预制拼装连接、预制构件、喷射加固修复、3D打印等不同应用领域下流变性能的要求，同时提出了改善UHPC流变性能的方法。 Abstract: The effects of various constituent materials(cement, mineral admixtures and nanomaterials, aggregates, fibers, additives) on the rheological properties of ultra-high performance concrete(UHPC) are summarized. The rheological performance requirements of UHPC in different application scenarios such as bridge deck paving, prefabricated assembly connections, prefabricated components, spray reinforcement repair, 3D printing are analyzed, and the methods to improve the rheological properties of UHPC are proposed.

张国芳,胡文佩.超高性能混凝土的流变性能及其应用研究进展[J].混凝土与水泥制品,2024(4):21-25,30. ZHANG G F,HU W P.Research progress on rheological properties of ultra-high performance concrete(UHPC) and its application[J].China Concrete and Cement Products,2024(4):21-25,30.

高温后预损伤混凝土的轴压试验研究

王连坤，梁锡东*，郭一彬，刘杰，林文皓

2024年第4期

摘要

引用本文

摘要：对不同预损伤程度下C30混凝土试件进行了高温（200、350、500 ℃）后轴心抗压试验，获取了试件的应力-应变全曲线，分析了高温对预损伤试件的质量损失率、峰值应力、峰值应变、弹性模量等的影响。结果表明：在相同温度下，预损伤程度越高的混凝土试件破坏越早；在相同预损伤程度下，高温温度越高，试件破坏越早；与温度相比，预损伤程度对试件轴压破坏的影响更大；各试件的质量损失率随着温度的升高而增加；预损伤程度越高，高温温度越高，试件的轴心抗压强度越低；随着温度的升高，各试件的峰值应力降低，峰值应变增加，上升段的斜率变小；各试件的弹性模量均随着温度的升高而降低。 Abstract: Axial compression tests were conducted on C30 concrete specimens with different degrees of pre-damage at high temperatures(200, 350, 500 ℃) to obtain the stress-strain curves of the specimens. The influence of high temperatures on the mass loss rate, peak stress, peak strain, elastic modulus, etc. of pre-damage specimens was analyzed. The results show that at the same temperature, the higher the degree of pre-damage, the earlier the concrete specimen fails. Under the same degree of pre-damage, the higher the high temperature, the earlier the specimen fails. Compared with temperature, the degree of pre-damage has a greater impact on the axial compression failure of the specimens. The mass loss rate of each specimen increases with the increase of temperature. The higher the degree of pre-damage and the higher the high temperature, the lower the axial compressive strength of the specimens. As the temperature increases, the peak stress of each specimen decreases, the peak strain increases, and the slope of the rising section of each curve decreases. The elastic modulus of each specimen decreases with the increase of temperature.

王连坤,梁锡东,郭一彬,等.高温后预损伤混凝土的轴压试验研究[J].混凝土与水泥制品,2024(4):26-30. WANG L K,LIANG X D,GUO Yibin,et al.Experimental study on axial compression of pre-damage concrete after high temperature[J].China Concrete and Cement Products,2024(4):26-30.

硫酸盐和碳酸盐侵蚀下水泥基材料抗压强度研究

陈阳1，温勇1，*，宋哲航1，刘佳1，郝恩泽1，李宇航1，把哈尔古丽·帕塔尔2

2024年第4期

摘要

引用本文

摘要：为探究不同摩尔比的碳酸根与硫酸根对碳硫硅钙石型硫酸盐侵蚀下的水泥基材料抗压强度的影响规律，选用五种不同配比的侵蚀溶液作为研究对象，进行了摩尔比（n碳酸根离子∶n硫酸根离子）为 2∶1、1.5∶1、1∶1、1∶1.5、1∶2 条件下的硫酸盐侵蚀试验，并对其侵蚀后的试件进行抗压强度测定。总结了不同摩尔比下水泥基材料的抗压强度随侵蚀龄期的变化规律。在此基础上建立了抗压强度随侵蚀时间的变化函数，得出了不同摩尔比下水泥基材料的抗压强度预测模型。 Abstract: In order to explore the influence law of different molar ratios of carbonate and sulfate on the compressive strength of cement-based materials under carbon-sulfur-silicate sulfate erosion, five erosion solutions with different proportions were selected as the research object, and the molar ratio(ncarbonate ion∶nsulfate ion) under the conditions of 2∶1, 1.5∶1, 1∶1, 1∶1.5, 1∶2 were carried out, and the compressive strength of the eroded specimens was measured. The change law of compressive strength of cement-based materials with erosion age at different molar ratios was summarized. On this basis, the change function of compressive strength with erosion time was established, and the prediction model of compressive strength of cement-based materials under different molar ratios was obtained.

陈阳,温勇,宋哲航,等.硫酸盐和碳酸盐侵蚀下水泥基材料抗压强度研究[J].混凝土与水泥制品,2024(4):31-33,37. CHEN Y,WEN Y,SONG Z H,et al.Study on compressive strength of cement-based materials under sulfate and carbonate erosion[J].China Concrete and Cement Products,2024(4):31-33,37.

早强剂对C30喷射混凝土抗压强度的影响

吉飞，李伟，陈本稳，李庆超，姜海东

2024年第4期

摘要

引用本文

摘要：研究了不同早强剂（元明粉、硫酸铝、七水硫酸镁、硝酸钙、亚硝酸钠、硫氰酸钠和CSH晶种）单掺及复掺对C30喷射混凝土抗压强度的影响。结果表明：不同厂家CSH晶种对C30喷射混凝土各龄期抗压强度的作用效果有所差异，其中，CSH晶种2#对抗压强度的提高效果最好；通过优化配合比，元明粉可以提高试件的早期抗压强度，且28 d抗压强度发展较好；硝酸钙、亚硝酸钠、硫氰酸钠单掺及与其他早强剂复掺对C30喷射混凝土8 h抗压强度的提高效果并不明显，甚至会降低喷射混凝土的抗压强度。 Abstract: The effect of different early strength agents(sodium sulfate, aluminum sulfate, magnesium sulfate heptahydrate, calcium nitrate, sodium nitrite, sodium thiocyanate, and CSH crystal seed) on the compressive strength of C30 shotcrete was studied by single and compound addition. The results show that the effect of CSH crystal seed from different manufacturers on the compressive strength of C30 shotcrete at different ages varies, among which CSH crystal seed 2# has the best effect on improving compressive strength. By optimizing the mix proportion, the early compressive strength of the specimens can be improved by using sodium sulfate, and the 28 d compressive strength development is better. The effect of adding calcium nitrate, sodium nitrite, sodium thiocyanate alone or in combination with other early strength agents on the 8 h compressive strength of C30 shotcrete is not significant, and may even reduce the compressive strength of shotcrete.

吉飞,李伟,陈本稳,等.早强剂对C30喷射混凝土抗压强度的影响[J].混凝土与水泥制品,2024(4):34-37. JI Fei, LI Wei, CHEN Benwen,et al.Influence of early strength agent on the compressive strength of C30 shotcrete[J].China Concrete and Cement Products,2024(4):34-37.

水泥混凝土制品

装配式UHPC-NC叠合梁抗弯性能数值模拟分析

赵亮

2024年第4期

摘要

引用本文

摘要：以某装配式钢筋混凝土框架剪力墙结构办公楼为研究背景，采用数值模拟方法，建立了三维装配式UHPC-NC叠合梁数值模型，研究了不同材料参数对装配式UHPC-NC叠合梁抗弯性能的影响。结果表明：提高NC的抗压强度对试件承载力和刚度的提升幅度较小；提高UHPC的抗拉强度对构件极限承载力的提高也不显著；增加UHPC受拉高度对构件抗弯承载力的提高显著；在实际工程中可通过提高纵筋配筋率来提高构件的极限抗弯承载力。 Abstract: Taking a multi-layer prefabricated reinforced concrete frame shear wall structure office building as the research background, a three-dimensional bending numerical model of UHPC-NC composite beams was established by using numerical simulation methods. The influence of different material parameters on the bending performance of the UHPC-NC composite beam structure was analyzed. The results show that the increase in NC compressive strength has a negligible increase in the load-bearing capacity of the composite beam, and it has an improvement in the stiffness of the composite beam, but the increase is not significant. Improving the tensile strength of UHPC can only slightly enhance the ultimate bearing capacity of the component. Increasing the tensile height of UHPC can effectively improve the flexural bearing capacity of composite beam structures. In practical engineering, the ultimate bearing capacity of the component wrist can be improved by increasing the ratio of longitudinal reinforcement under tension.

赵亮.装配式UHPC-NC叠合梁抗弯性能数值模拟分析[J].混凝土与水泥制品,2024(4):38-41,47. ZHAO L.Numerical simulation analysis on the bending performance of prefabricated UHPC-NC composite beams[J].China Concrete and Cement Products,2024(4):38-41,47.

掺磷尾矿砂的UHPC板抗弯性能试验研究

王卓群1，宗钟凌1，2，3，*，谢青海1，2，骆辉1，卢浩宇1，赖斌1，高子晴1

2024年第4期

摘要

引用本文

摘要：使用磷尾矿砂取代部分河砂制备了超高性能混凝土（UHPC），研究了不同磷尾矿砂取代率（0~20%）对UHPC试件强度与弹性模量的影响，优选出最佳配合比，制作了5块配筋UHPC板，研究了不同厚度及配筋率对UHPC板抗弯性能的影响。结果表明：随着磷尾矿砂取代率的增加，试件的抗压强度与弹性模量呈先增加后下降的趋势；当磷尾矿砂取代率为10%，试件的抗压强度和弹性模量达到峰值，而抗拉强度随着磷尾矿砂取代率的增加而显著降低；在局部荷载作用下，配筋UHPC板的极限承载力和弯曲韧性随着配筋率和截面高度的增大而提高。此外，基于试验得到的UHPC受压本构曲线，建立了配筋UHPC板数值仿真模型，发现分析结果与抗弯试验结果吻合较好。 Abstract: The Ultra-high performance concrete(UHPC) was prepared by replacing some river sand with phosphorus tailing sand. The influence of different replacement rates (0~20%) of phosphorus tailing sand on the strength and elastic modulus of UHPC was studied, and the optimal mix proportion was selected. Five reinforced UHPC slabs were made, and the effects of different thicknesses and reinforcement ratios on the flexural performance of UHPC slabs were studied. The results show that as the replacement rate of phosphorus tailing sand increases, the compressive strength and elastic modulus of the specimens show a trend of first increasing and then decreasing. When the replacement rate of phosphorus tailing sand is 10%, the compressive strength and elastic modulus of the specimen are the highest, while the tensile strength significantly decreases with the increase of the replacement rate of phosphorus tailing sand. Under local loads, the ultimate bearing capacity and flexural toughness of reinforced UHPC slabs increase with the increase of reinforcement ratio and section height. In addition, the numerical simulation model for reinforced UHPC slabs is established based on the compression constitutive curves of UHPC from the tests, and the analysis results are in good agreement with the flexural test results.

王卓群,宗钟凌,谢青海,等.掺磷尾矿砂的UHPC板抗弯性能试验研究[J].混凝土与水泥制品,2024(4):42-47. WANG Z Q,ZONG Z L,XIE Q H,et al.Experimental study on flexural behavior of UHPC slabs with phosphorus tailing sand[J].China Concrete and Cement Products,2024(4):42-47.

纤维材料及制品

机制砂高延性工程水泥基复合材料（ECC）的性能研究

曹鑫铖，李龙梓，张立力，蒋涛，叶国林，宋秋磊

2024年第4期

摘要

引用本文

摘要：采用双因素方差分析法，研究了水胶比（0.30、0.35、0.40）和砂胶比（0.35、0.45、0.55）对工程水泥基复合材料（ECC）抗压和抗折强度的影响，优选出了最佳水胶比和砂胶比。在此基础上，研究了PVA纤维体积掺量（1.0%、1.5%、2.0%）和机制砂掺量（0、50%、100%）对ECC弯曲韧性的影响，并采用非线性回归法建立了预测模型。结果表明：ECC的最佳水胶比和砂胶比分别为0.30和0.55；掺入适量机制砂能在一定程度上提高ECC的峰值挠度，改善ECC的弯曲韧性；当PVA纤维体积掺量为2.0%、机制砂掺量为50%时，ECC的各项弯曲韧性指标相对最优；建立的机制砂高延性ECC峰值抗弯强度和峰值挠度预测模型的拟合精度较高，具有一定的适用性。 Abstract: The influence of water-binder ratio(0.30, 0.35, 0.40) and sand-binder ratio(0.35, 0.45, 0.55) on the compressive and flexural strength of engineered cementitious composites(ECC) was studied by using the two factor analysis of variance method, and the optimal water-binder ratio and sand-binder ratio were selected. On this basis, the effects of PVA fiber volume contents (1.0%, 1.5%, 2.0%) and manufactured sand contents(0, 50%, 100%) on the bending performance of ECC were studied, and a predictive model was established by using nonlinear regression method. The results show that the optimal water-binder ratio and sand-binder ratio for ECC are 0.30 and 0.55, respectively. Adding an appropriate content of manufactured sand can improve the peak deflection and bending toughness of ECC to a certain extent. When the volume content of PVA fiber is 2.0% and the content of manufactured sand is 50%, the various bending toughness indicators of ECC are relatively optimal. The established prediction models of peak bending strength and peak deflection of manufactured sand high ductility ECC have high fitting accuracy and certain applicability.

曹鑫铖,李龙梓,张立力,等.机制砂高延性工程水泥基复合材料（ECC）的性能研究[J].混凝土与水泥制品,2024(4):48-52. CAO X C,LI L Z,ZHANG L L,Performance study on high ductility engineered cementitious composites (ECC) with manufactured sand48-52.

SAP预湿水量对UHPC性能的影响

李信1，2，陈露一1，2

2024年第4期

摘要

引用本文

摘要：研究了高吸水性树脂（SAP）的预湿水量（0、20、30、40 kg/m3）对超高性能混凝土（UHPC）工作性、力学性能和收缩性能的影响。结果表明：随着SAP预湿水量的增加，UHPC的初始和3 h扩展度均增加，3 d和28 d抗压强度均降低，且3 d抗压强度降低更明显，自收缩值降低，干燥收缩值增大。 Abstract: The effect of pre-wetting water content (0, 20, 30, 40 kg/m3) of super absorbent polymer(SAP) on the workability, mechanical properties, and shrinkage performance of ultra-high performance concrete(UHPC) was studied. The results show that with the increase of SAP pre-wetting water content, the initial and 3 h slump-flow of UHPC increase, the 3 d and 28 d compressive strength decrease, and the 3 d compressive strength decreases more significantly, and the self shrinkage value decreases and the drying shrinkage value increases.

李信,陈露一.SAP预湿水量对UHPC性能的影响[J].混凝土与水泥制品,2024(4):53-55. LI X,CHEN L Y.Pre-wetting water content of SAP on performance of UHPC[J].China Concrete and Cement Products,2024(4):53-55.

水稻秸秆纤维对混凝土抗压性能的影响

张烜，赵瑜，黄真江，张坤，陆智杰

2024年第4期

摘要

引用本文

摘要：研究了水稻秸秆纤维的长度（10~30 mm、40~60 mm）和掺量（0、2、4、8 kg/m3）对混凝土抗压强度的影响，分析了试件表面的裂缝情况，并进行了析因分析。结果表明：掺入适量水稻秸秆纤维能有效提高混凝土的1、14、28 d抗压强度，改善单轴压缩作用下混凝土表面裂缝的形态及分布情况，且较长水稻秸秆纤维的提高作用相对更好；水稻秸秆纤维对混凝土1、14、28 d抗压强度的影响程度大小均为：掺量>长度与掺量共同作用>长度；考虑28 d抗压强度时，建议水稻秸秆纤维的长度为40~60 mm、掺量为2 kg/m3。 Abstract: The effects of the length(10~30 mm、40~60 mm) and content(0, 2, 4, 8 kg/m3) of rice straw fiber on the compressive strength of concrete were studied, the surface cracks of the specimens were analyzed, and the factorial analysis was conducted. The results show that adding an appropriate content of rice straw fiber can effectively improve the 1 d, 14 d, and 28 d compressive strength of concrete, improve the morphology and distribution of surface cracks under uniaxial compression, and the improvement effect of longer rice straw fiber is relatively better. The influence degree of rice straw fiber on the 1 d, 14 d, and 28 d compressive strength of concrete is as follows: content > combined effect of length and content > length. When considering the 28 d compressive strength, it is recommended that the length of rice straw fiber be 40~60 mm and the content be 2 kg/m3.

张烜,赵瑜,黄真江,等.水稻秸秆纤维对混凝土抗压性能的影响[J].混凝土与水泥制品,2024(4):56-58,62. ZHANG X,ZHAO Y,HUANG Z J,et al.Effect of rice straw fibers on compressive performance of concrete[J].China Concrete and Cement Products,2024(4):56-58,62.

混杂纤维混凝土的力学性能及微观分析

霍曼琳1，杨国栋1，*，曹玉新2，靳利安3，聂华3

2024年第4期

摘要

引用本文

摘要：通过L9（33）正交试验研究了玄武岩纤维（BF）、聚丙烯纤维（PPF）和粉煤灰的掺量对混凝土力学性能的影响，并进行了微观分析。结果表明：混掺适量PPF和BF，同时掺入适量粉煤灰可有效改善混杂纤维混凝土的力学性能及微观结构；综合考虑，推荐PPF、BF、粉煤灰的掺量分别为0.10%、0.10%、20%。 Abstract: The effects of the contents of basalt fiber (BF), polypropylene fiber (PPF) and fly ash on the mechanical properties of concrete were investigated by L9(33) orthogonal test, and the micro analysis was carried out. The results show that mixing appropriate contents of PPF and BF, along with appropriate contents of fly ash can effectively improve the mechanical properties and microstructure of hybrid fiber reinforced concrete. For comprehensive consideration, the recommend contents of PPF, BF, and fly ash are 0.10%, 0.10%, and 20%, respectively.

霍曼琳,杨国栋,曹玉新,等.混杂纤维混凝土的力学性能及微观分析[J].混凝土与水泥制品,2024(4):59-62. HUO M L,YANG G D,CAO Y X,et al.Mechanical properties and micro analysis of hybrid fiber reinforced Concrete[J].China Concrete and Cement Products,2024(4):59-62.

房建材料及制品

钢筋混凝土开洞梁力学性能研究现状与进展

张扬1，颜阳2，熊学玉1，3，*，陈率4，陶华4

2024年第4期

摘要

引用本文

摘要：总结了国内外钢筋混凝土开洞梁的受力机理、受力性能、洞口补强加固方式、承载能力计算等研究现状。现有研究结果表明：洞口上、下弦杆可看作是偏心受压和偏心受拉状态；当洞口尺寸较小时，钢筋混凝土开洞梁可看作带有斜压腹杆的桁架模型，当洞口尺寸较大时，洞口部分为无斜压腹杆的平行弦杆以及无洞口部分的带有斜压腹杆的桁架模型；钢筋混凝土开洞梁主要有孔侧破坏和孔间破坏两种破坏模式；钢筋混凝土开洞梁的结构响应主要取决于荷载路径的中断程度；随着洞口高度和宽度的增加，钢筋混凝土开洞梁的承载力会降低，但若设计合理，不会形成薄弱区；普通钢筋、纤维布和纤维板都可用于洞口区域的加固，相应的抗剪承载力计算也较为完善。 Abstract: Based on the literature at home and abroad, the research status of reinforced concrete beams with openings in terms of mechanical mechanism, mechanical performance, reinforcement methods of openings, and calculation of bearing capacity are summarized. The existing research results show that the upper chord and the lower chord in the openings can be regarded as eccentric compression and eccentric tension, respectively. When the size of the openings is small, the reinforced concrete beams with openings can be regarded as a truss model with diagonal web members, and when the size of the openings is large, the reinforced concrete beams with openings can be regarded as parallel chords without diagonal web members at the openings and truss model with diagonal web members at the no-openings. There are two main failure modes of reinforced concrete beams with openings, namely, opening side failure and inter-opening failure. The structural response of reinforced concrete beams with openings mainly depends on the interruption degree of load path. With the increase of the height and width of the openings, the bearing capacity of reinforced concrete beams with openings decreases, and if the design is reasonable, weak areas can not be formed. Ordinary steel bars, fiber cloth, and fiber plate can be used to strengthen the opening area, and the corresponding calculation of shear bearing capacity is also relatively perfect. The research results can provide a reference for the popularization and application of reinforced concrete beams with openings.

张扬,颜阳,熊学玉,等.钢筋混凝土开洞梁力学性能研究现状与进展[J].混凝土与水泥制品,2024(4):63-69,76. ZHANG Y,YAN Y,XIONG X Y,et al.Research status and progress of mechanical properties of reinforced concrete beams with openings[J].China Concrete and Cement Products,2024(4):63-69,76.

预制内外复合保温模壳拼装墙体热工性能研究

王洪镇1，2，张笑笑1，*，杨永恒1，王璟1，褚文斌1，高潇1，李雨泽1

2024年第4期

摘要

引用本文

摘要：为探究预制内外复合保温模壳拼装墙体结构中的卡板连接件对墙体热工性能的影响，通过热工理论计算、试验研究、ANSYS有限元热分析模拟软件3种方法，对比分析了无连接件、不同数量连接件以及双面抹灰不同条件下墙体的传热系数。结果表明：在无连接件条件下，实际墙体热工试验测试值与热工理论计算值的误差较小；连接件数量越多，热桥效应越明显，墙体的热工性能越差；采用有限元模拟软件对墙体进行热工设计结果较精确，可作为设计依据；研究结果可为模壳拼装墙体在超低能耗建筑的应用及能耗分析提供借鉴。 Abstract: In order to explore the influence of the plate connector on the thermal performance of the prefabricated interior and exterior composite insulation mold shell assembled wall， the heat transfer coefficients of the walls under different conditions were obtained by comparing and analyzing walls with non-connecting parts, different number of connecting parts and single and double plastered walls by using the methods of thermal theory calculation, practical test detection and ANSYS finite element thermal analysis simulation software. The results show that under the condition of non-connecting parts, the error between the actual wall thermal test values and the theoretical thermal calculation values is relatively small. The more connectors there are, the more obvious the thermal bridge effect, and the poorer the thermal performance of the wall. The thermal design results of the wall by using finite element simulation software are accurate and can be used as a design basis. The results provide reference for subsequent energy consumption analysis in ultra-low energy consumption buildings.

王洪镇,张笑笑,杨永恒,等.预制内外复合保温模壳拼装墙体热工性能研究[J].混凝土与水泥制品,2024(4):70-76. WANG H Z,ZHANG X X,YANG Y H,et al.Study on thermal performance of assembled wall with prefabricated internal and external composite insulation mold shell[J].China Concrete and Cement Products,2024(4):70-76.

标准解读

JC/T 2723—2022《预应力混凝土实心方桩》标准解读

蒋元海

2023年第4期

摘要

引用本文

为便于 JC/T 2723—2022《预应力混凝土实心方桩》的使用方准确理解标准条款的具体含义，正确贯彻实施标准条款的具体要求和规定，简述了该标准的编制背景、编制目的和意义，解释说明了标准条文的具体内容，并指出了标准实施过程中应注意的事项。 In order to facilitate the user of JC/T 2723—2022 Prestressed Concrete Solid Square Pile to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the preparation background, purpose and significance of the JC/T 2723—2022 are briefly described, the specific contents of the standard provisions are explained in detail, and the problems that should be paid attention to in the implementation process are put forward.

蒋元海.JC/T 2723—2022《预应力混凝土实心方桩》标准解读[J].混凝土与水泥制品,2023(4):81-84. JIANG Y H.Interpretation on JC/T 2723—2022 Prestressed Concrete Solid Square Pile[J].China Concrete and Cement Products,2023(4):81-84.

检测及试验方法研究

灌浆料测强曲线对龄期与抗压强度的适用性研究

赵建华1，谢慧晟2，张建宇1，凌良建2，周红燕3，吕嘉2

2023年第4期

摘要

引用本文

选择不同灌浆料制作了标准试件和模拟孔道PVC管试件，根据DB32/T 3754—2020《装配整体式混凝土结构检测技术规程》的要求，基于标准试件的抗压强度和模拟孔道PVC管试件的表面硬度建立了灌浆料测强曲线，分析了测强曲线对灌浆料龄期和抗压强度的适用性。结果表明：在灌浆料龄期≥14 d或抗压强度≥60 MPa的情况下，采用DB32/T 3754—2020中的方法建立的灌浆料测强曲线的适用性更强，可为实际工程中不同灌浆料实体抗压强度检测时间的选取提供参考。 Different sleeve grouting materials were selected to make standard test pieces and PVC pipe test pieces with simulated channels. According to the requirements of DB32/T 3754—2020 Technical Specification for Inspection of Monolithic Precast Concrete Structure, the strength curve of the grouting material was established based on the compressive strength of standard test pieces and the surface hardness of PVC pipe test pieces with simulated channels, and the applicability of the strength curve to the age and compressive strength was analyzed. The results show that when the age of grouting material is ≥14 days or the compressive strength of grouting material is ≥60 MPa, the strength test curve of grouting material established by the method in DB32/T 3754—2020 is more applicable, which can provide a reference for the selection of the testing time of the solid compressive strength of different grouting materials in practical projects.

赵建华,谢慧晟,张建宇,等.灌浆料测强曲线对龄期与抗压强度的适用性研究[J].混凝土与水泥制品,2023(4):85-87,92. ZHAO J H,XIE H S,ZHANG J Y,et al.Study on the Applicability of Grouting Material Strength Curve to Age and Compressive Strength[J].China Concrete and Cement Products,2023(4):85-87,92.

节能降碳

固废基胶凝材料的粒度分布与其性能的关联度

张艳佳1，2，张广田1，2，*，于海洋1，2，贺光炜1，2

2024年第4期

摘要

引用本文

摘要：以矿渣、钢渣、脱硫石膏、粉煤灰为主要原材料制备了固废基胶凝材料，研究了粉磨时间（5、10、15 min）对固废基胶凝材料比表面积、粒度分布、标准稠度用水量和胶砂抗压强度的影响，并通过灰色关联分析方法探究了固废基胶凝材料的粒度分布与标准稠度用水量和抗压强度之间的关联度。结果表明：随着粉磨时间的增加，固废基胶凝材料的细度、比表面积、标准稠度用水量和胶砂抗压强度均增大；固废基胶凝材料的标准稠度用水量和胶砂的抗压强度均与粒度小于20 μm的颗粒含量呈正相关，与粒度大于等于20 μm的颗粒含量呈负相关；适当减少粒度10~20 μm的颗粒含量或增加粒度20~32 μm的颗粒含量，均可在一定程度上降低固废基胶凝材料的标准稠度用水量；增加粒度0~3 μm、10~20 μm的颗粒含量分别有助于提高胶砂的3 d、28 d抗压强度。 Abstract: Solid waste based cementitious materials were prepared by using slag, steel slag, desulfurization gypsum, and fly ash as the main raw materials. The effects of grinding time(5, 10, 15 min) on the specific surface area, particle size distribution, and water requirement of normal consistency of solid waste based cementitious materials, and compressive strength of the mortar were studied. The correlation degree between particle size distribution of solid waste based cementitious materials and water requirement of normal consistency, and compressive strength was explored through grey correlation analysis method. The results show that as the grinding time increases, the fineness, specific surface area, and water requirement of normal consistency of solid waste based cementitious materials, and compressive strength of the mortar all increase. The water requirement of normal consistency of solid waste based cementitious materials and the compressive strength of the mortar are positively correlated with the content of particles with particle size less than 20 μm, and negatively correlated with the content of particles with particle size greater than or equal to 20 μm. By appropriately reducing the content of particles with particle size of 10~20 μm or increasing the content of particles with particle size of 20~32 μm, the water requirement of normal consistency of solid waste based cementitious materials can be reduced to a certain extent. Increasing the content of particles with particle size of 0~3 μm and 10~20 μm respectively helps to improve the 3 d and 28 d compressive strength of the mortar.

张艳佳,张广田,于海洋,等.固废基胶凝材料的粒度分布与其性能的关联度[J].混凝土与水泥制品,2024(4):87-90,95. ZHANG Y J,ZHANG G T,YU H Y+,et al.Correlation degree between particle size distribution and performance of solid waste based cementitious materials[J].China Concrete and Cement Products,2024(4):87-90,95.

主塔C60大体积混凝土配合比设计及性能研究

盖珂瑜1，2，龙勇1，2，蒋本俊1，3，王宇1，2，周毅1，2，李晨1，2

2024年第4期

摘要

引用本文

摘要：研究了粉煤灰单掺、粉煤灰与矿渣粉或降黏剂复掺对主塔C60大体积混凝土工作性、力学性能、绝热温升和收缩性能的影响。结果表明：掺入适量降黏剂提高了混凝土的流动性，而掺入矿渣粉降低了混凝土的流动性，但仍满足施工要求；与单掺粉煤灰的试验组相比，复掺适量降黏剂提高了混凝土的抗压强度和弹性模量，降低了绝热温升和自收缩，对劈裂抗拉强度和干燥收缩的影响较小，而复掺适量矿渣粉后，混凝土的7 d抗压强度略有降低，28 d、60 d抗压强度增大，弹性模量增大，绝热温升和干燥收缩降低，28 d劈裂抗拉强度和自收缩变化不大。 Abstract: The effects of single addition of fly ash, compound addition of fly ash and slag powder or viscosity reducer on the workability, mechanical properties, adiabatic temperature rise, and shrinkage performance of C60 mass concrete for main tower were studied. The results show that adding an appropriate content of viscosity reducer improves the flowability of concrete, while adding slag powder reduces the flowability of concrete, but still meets the construction requirements. Compared with the experimental group with a single addition of fly ash, adding an appropriate content of viscosity reducer increases the compressive strength and elastic modulus of concrete, reduces adiabatic temperature rise and self shrinkage, and has a smaller impact on splitting tensile strength and dry shrinkage. However, after adding an appropriate content of slag powder, the 7 d compressive strength of concrete slightly decreases, while the 28 d and 60 d compressive strength increase, the elastic modulus increases, the adiabatic temperature rise and dry shrinkage decrease, and the 28 d splitting tensile strength and self shrinkage do not show significant changes.

盖珂瑜,龙勇,蒋本俊,等.主塔C60大体积混凝土配合比设计及性能研究[J].混凝土与水泥制品,2024(4):91-95. GE K Y,LONG Y,JIANG B J,et al.Mix proportion design and performance study of C60 mass concrete for main tower[J].China Concrete and Cement Products,2024(4):91-95.

超细粉煤灰特性及其在混凝土中的应用研究

王玉斌1，尹韶宁2，潘栋2，李梓源1，王娜1，3，袁鹏2

2024年第4期

摘要

引用本文

摘要：制备了不同细度（674、810、1 126 m2/kg）的超细粉煤灰，研究了其掺量（0~25%）对水泥-超细粉煤灰胶凝材料性能的影响，分析了掺不同细度超细粉煤灰混凝土的工作性、力学性能和耐久性能。结果表明：超细粉煤灰的强度活性指数和需水量比均随着其细度的增加而增大；用0~25%的超细粉煤灰替代P·O 42.5级水泥后，胶凝材料的初凝、终凝时间分别延长了11~71 min、13~74 min；与未掺超细粉煤灰的混凝土相比，掺超细粉煤灰混凝土的坍落度提高，3 d和7 d抗压强度相差不大，28、56、90 d抗压强度均有所提高，抗碳化性能和抗硫酸盐侵蚀性能均有所提升。 Abstract: Ultrafine fly ash with different fineness (674, 810, 1 126 m2/kg) was prepared, and the effects of its content (0~25%) on the properties of cement-ultrafine fly ash cementitious materials was studied. The workability, mechanical properties, and durability of concrete with different fineness ultrafine fly ash were analyzed. The results show that the strength activity index and water demand ratio of ultrafine fly ash increase with the increase of the fineness. After replacing P·O 42.5 cement with 0~25% content of ultrafine fly ash, the initial setting time and final setting time of the cementitious materials are extended by 11~71 min and 13~74 min, respectively. Compared with the concrete without ultrafine fly ash, the slump of concrete with ultrafine fly ash is increased, the 3 d and 28 d compressive strength are not significantly different, the 28 d, 56 d, and 90 d compressive strength are increased, and the carbonation resistance and sulfate corrosion resistance are improved.

王玉斌,尹韶宁,潘栋,等.超细粉煤灰特性及其在混凝土中的应用研究[J].混凝土与水泥制品,2024(4):96-100. WANG Y B,YIN S N,PAN D,et al.Study on characteristics of ultrafine fly ash and its application in concrete[J].China Concrete and Cement Products,2024(4):96-100.

读者之友

《混凝土与水泥制品》“3D打印混凝土”与“节能利废混凝土”专题征稿启事

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珊瑚碎屑混凝土的强度特性及破坏形态分析

王磊1,2，范蕾1,2

2015年第1期

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摘要：针对目前对珊瑚碎屑混凝土的力学机理尚不清晰这一问题，对不同龄期和水灰比的珊瑚混凝土试块进行了试验研究。试验结果表明，珊瑚混凝土具有早强、快硬的特点；同时，当水灰比减小到一定程度后，单纯减小水灰比并不能明显提高珊瑚混凝土的抗压强度。本文从材料特性、界面特性以及龄期和水灰比等方面着手，对珊瑚混凝土的强度特性作了详细分析，并介绍了珊瑚混凝土的破坏形态，从而可为珊瑚碎屑应用于海岛混凝土工程提供一定的参考依据。 Abstract: Currently, the mechanical mechanism of coral debris concrete is not well understood, so the research on coral concrete test block in different age and water cement ratio is carried out. The test results show that coral concrete has the characteristics of fast strengthening and hardening, and when the water cement ratio decreases to a certain extent, simply reducing the water cement ratio could not result in obvious additions of compressive strength of coral concrete. From the aspects of material properties, interface properties，age and water cement ratio, the strength characteristics of the coral concrete are analyzed in detail, and the failure pattern is introduced, which can provide reference for application of coral debris in island concrete engineering.

王磊,范蕾. 珊瑚碎屑混凝土的强度特性及破坏形态分析[J].混凝土与水泥制品,2015(1):1-4. WANG L,FAN L.Strength Characteristic and Failure Pattern Analysis on Coral Debris Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(1):1-4.

装配式结构用高强套筒灌浆料性能试验研究

汪秀石，杨智良，吴照学

2015年第2期

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摘要：研究了装配式结构用高强套筒灌浆料的性能，通过试配并进行了流动度、强度和膨胀性试验，优选出了优化配合比。同时基于优化配合比进行了水胶比、减水剂掺量和膨胀剂掺量对高强套筒灌浆料性能影响的研究。试验结果表明，随着水胶比（W/B）增加，流动度逐渐增大，但强度随W/B增加呈现明显降低趋势；减水剂可有效改善流动度，而当掺量过多时对强度有一定的影响；膨胀率随膨胀剂掺量增加呈现增长趋势，但当掺量小于8.0%时，膨胀效果较差，掺量大于12.0%时，对流动度和强度产生不利影响。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.

汪秀石,杨智良,吴照学.装配式结构用高强套筒灌浆料性能试验研究[J].混凝土与水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.

再生粗骨料强化处理工艺对再生混凝土性能的影响

郭远新，李秋义，孔哲，岳公冰，韩帅

2015年第6期

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摘要：分别采用物理强化、化学强化和物理-化学复合强化三种不同的强化方式对简单破碎再生粗骨料进行强化处理，并采用100%取代天然碎石制备再生粗骨料混凝土，研究了不同强化处理后的再生粗骨料对混凝土工作性能、力学性能、抗渗透性能和抗碳化性能的影响。结果表明，经过强化处理的再生粗骨料混凝土的各项性能均有不同程度的提高，其中经二次物理强化处理后的再生粗骨料混凝土的用水量较天然碎石混凝土仅增加了6kg/m3，其抗压强度也达到最高值，接近于天然碎石混凝土；经二次物理强化和化学浸渍复合强化处理后的再生混凝土氯离子扩散系数降低了13.6%；三种不同的强化方式处理后，再生混凝土的碳化深度和碳化速度均有所降低。 Abstract: Three kinds of different strengthening technologies of physical enhancement, chemical enhancement and physical-chemical compound enhancement to strengthen the simple crushing recycled coarse aggregate are adopted, with 100% replaced natural gravel preparation of recycled coarse aggregate concrete, and the influences of the recycled coarse aggregate of different strengthening treatment on the working performance, mechanical properties, penetration resistance and carbonation resistance of concrete are studied. The research results show that, through strengthening treatment, recycled coarse aggregate concrete properties are improved to different degrees, the water consumption of recycled coarse aggregate concrete after the secondary physical strengthen treatment is only increased by 6kg/m3 than that of natural gravel concrete. The compressive strength also reached the highest value, close to the natural gravel concrete. The chloride ion diffusion coefficient of recycled concrete after the secondary physical-chemical compound strengthening treatment is reduced by 13.6%. The depth of carbonation and carbonation velocity decrease after three kinds of different strengthening treatments.

郭远新,李秋义,孔哲,等.再生粗骨料强化处理工艺对再生混凝土性能的影响[J].混凝土与水泥制品,2015(6):11-17. GUO Y X,LI Q Y,KONG Z,et al.Influence of Strengthening Treatment Technology of Recycled Coarse Aggregate on Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(6):11-17.

无砂再生透水混凝土配合比设计

张松涛1，贾欣悦2，宋卓1，贾艳东1

2016年第12期

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张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12. ZHANG S T,JIA X Y,SONG Z,et al.Design on Mix Proportion of No-fines Pervious Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(12):6-12.

清水混凝土概念、研究现状、存在问题及配合比设计方综述

郭伟1，路林海2，王龙志3，崔鑫3，王桂玲4，张海霞3

2016年第10期

摘要

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摘要：20世纪90年代后期以来，清水混凝土研究及工程应用得到了长足发展，许多城市建成了清水混凝土标志性工程。为了更好地促进清水混凝土研究的深入、工程质量的提高，对清水混凝土的概念、研究现状、存在问题及现有的清水混凝土配合比设计方法进行了系统地梳理、总结。通过对清水混凝土现状的研究，可使相关领域技术人员认识到清水混凝土发展中存在的不足、明确清水混凝土的研究方向，以实现清水混凝土技术研究水平的再提高，有力地支持清水混凝土工程应用的进一步推广。 Abstract: Since the late 1990s, research and application of fair-faced concrete has made considerable progress, many cities built landmark projects of fair-faced concrete. In order to better promote the study in-depth and the engineering quality improvement of fair-faced concrete, the concept, research status, existing problems and mixture design methods of fair-faced concrete are systematically reviewed and summarized. Through the above study of fair-faced concrete, the relevant technicians recognize the lack of fair-faced concrete in the development and realize a clear research direction, in order to improve research level, strongly support further promotion of fair-faced concrete in engineering applications.

郭伟,路林海,王龙志,等.清水混凝土概念、研究现状、存在问题及配合比设计方法综述[J].混凝土与水泥制品,2016(10):23-27. GUO W,LU L H,WANG L Z,et al.Summary for Concept, Research Status, Existing Problems and Mix Proportion Design of Fair-faced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(10):23-27.

新型装配式建筑构件生产及其施工技术的研究与应用

范玉1,4，徐华2，黄新3，黄继战4，马北京4

2015年第12期

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摘要：通过对建筑PC构件的设计、生产、施工进行的研究，对建筑PC构件进行了再设计及优化，确定了合理的PC构件生产及其施工工艺方案，并对影响PC构件质量的相关因素进行了分析。 Abstract: Through the research on design of PC component, production and construction, construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.

范玉,徐华,黄新,等.新型装配式建筑构件生产及其施工技术的研究与应用[J].混凝土与水泥制品,2015(12):87-89. FAN Y, XU H,HUANG X,et al.Research and Application of Production for New Type of Prefabricated Construction Component and Its Construction Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):87-89.

石墨烯纳米片对水泥基复合材料力学性能的影响

王辉，刘爱红，李航

2015年第12期

摘要

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摘要：采用球磨法将石墨烯纳米片分散在水泥基体中，研究了石墨烯纳米片掺量对水泥基材料抗折强度和抗压强度的影响。实验结果表明，适量的石墨烯纳米片可均匀分散在水泥基体中，通过桥联效应和拔出效应对水泥基材料起增强增韧作用，当石墨烯纳米片掺量为0.04%时，石墨烯纳米片与水泥基体界面结合良好，没有明显过渡层，试件3d抗折强度和抗压强度分别提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.

王辉,刘爱红,李航.石墨烯纳米片对水泥基复合材料力学性能的影响[J].混凝土与水泥制品,2015(12):25-27. WANG H,LIU A H,LI H.Influence of Graphene Nanoplatelets on Mechanical Properties of Cement-based Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):25-27.

大型智能PC构件自动化生产线简介

孙红1，孙健1，吴玉厚1，赵凯军2

2015年第3期

摘要

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摘要：根据混凝土工厂化生产的需要，阐述了大型智能PC构件生产线的组成部分、工艺过程和技术重点；分析了该生产线中蕴含的微观物流、信息采集、分布式控制及多智能体的协同过程，总结了PC构件生产线的优点和技术创新突破点，可为大型智能PC构件全自动生产线的研制提供理论基础和技术依据。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.

孙红,孙健,吴玉厚,等.大型智能PC构件自动化生产线简介[J].混凝土与水泥制品,2015(3):45-48. SUN H,SUN J,WU Y H,et al.Introduction of Large Scale Intelligent PC Automatic Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(3):45-48.

建筑垃圾再生微粉的研究现状

毛新奇1,2，屈文俊1，朱鹏1

2015年第8期

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摘要：建筑垃圾再生微粉各项性能的研究是推进建筑垃圾资源化的重要基础。根据近年来国内关于再生微粉的主要研究成果，对材料来源、制备工艺、工作性能、力学性能和耐久性能等方面进行了综述，并对相关的影响因素进行了探讨分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.

毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.

再生粗骨料及再生混凝土性能研究进展

甘福1，周脉席1,3，濮琦2

2018年第9期

摘要

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摘要：结合国内外再生粗骨料混凝土的研究现状，综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容，展望了再生粗骨料及再生混凝土未来研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.

甘福,周脉席,濮琦.再生粗骨料及再生混凝土性能研究进展[J].混凝土与水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.

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